The file /etc/gshadow.lock is not present. /etc/shadow.lock and
/etc/passwd.lock are present.
Removing both *.lock file's did the trick.
I do not remember a crash while using a guest session, but my system did
indeed crashed once before.
--
ntp failed to install/upgrade: useradd: cannot lock
*** This bug is a duplicate of bug 432964 ***
https://bugs.launchpad.net/bugs/432964
Thanks for following up. I'm marking as duplicate of bug 432964. Don't
hesitate to submit any new bug.
** Changed in: shadow (Ubuntu)
Status: Incomplete = Confirmed
** This bug has been marked a
